CN214370649U - Ice melting structure, ice cold storage unit and air conditioning system - Google Patents
Ice melting structure, ice cold storage unit and air conditioning system Download PDFInfo
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- CN214370649U CN214370649U CN202023080210.6U CN202023080210U CN214370649U CN 214370649 U CN214370649 U CN 214370649U CN 202023080210 U CN202023080210 U CN 202023080210U CN 214370649 U CN214370649 U CN 214370649U
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Abstract
The utility model provides an ice-melt structure, ice cold-storage unit and air conditioning system relates to the cold-storage field, has solved the relatively poor technical problem of ice-melt structure stability under the low-load in the ice cold-storage unit. The ice melting structure comprises an adjusting part and a heat exchanger, the heat exchanger, a pump body connected with the heat exchanger and a valve are located on a first branch circuit communicated with the ice storage tank, and the adjusting part is located on a second branch circuit communicated with the ice storage tank and used for adjusting the flow of secondary refrigerant after heat exchange with the ice storage tank to the first branch circuit. The ice melting structure divides the secondary refrigerant through the adjusting part on the second branch, when the load at the tail end of a user is low, the pump body can be adjusted to the lowest stable frequency, the opening degree of the valve is reduced to the minimum stable opening degree, if the low load of the user end can not be met, the adjusting part is opened and the opening degree of the adjusting part is increased, the low load requirement at the tail end of the user is further met, the operation of the pump body and the opening degree of the valve are in a reasonable interval, and the operation stability of the ice melting structure is ensured.
Description
Technical Field
The utility model belongs to the technical field of the cold-storage technique and specifically relates to an ice-melt structure, ice cold-storage unit and air conditioning system are related to.
Background
The ice storage air conditioner uses the electricity consumption valley period at night with very low electric load, adopts the electric refrigerator for refrigeration, leads the storage medium to be frozen, and uses the sensible heat and latent heat characteristics of the storage medium to store the cold quantity. And in the peak period of power utilization, the ice is melted to release cold energy to meet the requirement of the cold load of the air conditioner.
The ice cold storage technology is applied to actual engineering more and more. In the prior art, ice is positioned in an ice storage tank, secondary refrigerant (commonly used ethylene glycol) flows in a coil pipe, melts the ice when reaching the ice storage tank and takes away cold energy in the ice storage tank, and then flows into a heat exchanger to exchange heat with chilled water so as to transfer the cold energy to air conditioner chilled water.
The applicant has found that the prior art has at least the following technical problems: in the actual operation control process, the load of the user terminal is constantly changed, when the load of the user terminal is reduced, the traditional control mode firstly adjusts the frequency of the water pump, and the opening of the valve is not adjusted until the frequency of the water pump is reduced to the minimum; or when the opening degree of the valve group is minimum, the frequency of the water pump is reduced. The water pump is easy to operate in an extremely low efficiency range for a long time, and the valve control is unstable due to the small opening of the valve.
Therefore, when the load at the tail end of a user is reduced to a certain degree in the existing ice melting structure, the water pump runs at the minimum frequency for a long time, and the problem of instability control easily exists when the valve is used at the minimum opening degree, so that the stability of the whole ice storage unit is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an ice melting structure, an ice storage unit and an air conditioning system, which solve the technical problem that the ice melting structure in the ice storage unit has poor stability under low load in the prior art; the utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides an ice-melt structure, including adjusting part and heat exchanger, wherein:
the heat exchanger, the pump body and the valve which are connected with the heat exchanger are positioned on a first branch circuit communicated with the ice storage tank, and the adjusting component is positioned on a second branch circuit communicated with the ice storage tank and used for adjusting the flow of the secondary refrigerant which exchanges heat with the ice storage tank and flows to the first branch circuit.
Preferably, the inlet end of the second branch is disposed adjacent to the outlet end of the ice storage tank.
Preferably, the inlet end of the adjusting component is communicated with the outlet end of the ice storage tank, and the outlet end of the adjusting component is communicated with the inlet end of the ice storage tank.
Preferably, there is a water outlet main at the outlet end of the ice storage tank, and there is a water inlet main at the inlet end of the ice storage tank, wherein:
the water inlet ends of the first branch and the second branch are connected with the water outlet main pipe, and the water outlet ends of the first branch and the second branch are connected with the water inlet main pipe.
Preferably, the regulating component is a regulating valve.
Preferably, the valve is connected to an inlet end of the heat exchanger, and the pump body is connected to an outlet end of the heat exchanger.
Preferably, the pump body connected with the heat exchanger is a variable frequency water pump.
Preferably, the adjusting part and a valve connected with the heat exchanger are both opening-adjustable throttle valves.
The utility model also provides an ice cold-storage unit, including hold the ice groove and with hold the above-mentioned ice-melt structure that the ice groove is connected.
The utility model also provides an air conditioning system, a serial communication port, including above-mentioned ice cold-storage unit.
Compared with the prior art, the utility model, following beneficial effect has:
1. the utility model provides an ice-melt structure, through the secondary refrigerant that is located the first branch road of adjusting part reposition of redundant personnel inflow on being located the second branch road, when user end load is lower, can adjust the pump body to minimum stable frequency, and not minimum limit frequency, valve aperture is transferred and is makeed down to minimum stable aperture, and non-minimum limit aperture, if still can't satisfy the low-load of user side, can open adjusting part and increase adjusting part aperture, further satisfy user end low-load demand, the aperture of pump body operation and valve is in a reasonable interval, guarantee ice-melt structure operation's stability.
2. The utility model provides an ice cold-storage unit, owing to including above-mentioned ice-melt structure, the event has the reliable and stable advantage of structure operation equally.
3. The utility model provides an air conditioning system, including above-mentioned ice cold-storage unit, can satisfy the terminal low-load demand of user, have the reliable advantage of operating stability equally.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the ice melting structure of the present invention;
FIG. 1 shows an ice storage tank; 2. a heat exchanger; 3. a pump body; 4. a valve; 5. adjusting the valve; 6. a user terminal; 7. a first branch; 8. a second branch circuit; 91. a water inlet main pipe; 92. and (4) a water outlet main pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the prior art, when the load at the tail end of a user is low, the frequency of a pump body connected with a heat exchanger and the opening degree of a valve connected with the heat exchanger can only be reduced. On one hand, when the frequency of the pump body is reduced to the minimum and the opening of the valve is adjusted to the minimum, the operation of the pump body and the valve is very unstable, and the problem of instability control is easy to exist, so that the stability of the whole system is influenced; on the other hand, as the end load of the user continues to decrease, the method of adjusting the pump body and valve may not be satisfactory.
Example 1
Referring to fig. 1, the arrows indicate the direction of flow of the coolant; the embodiment provides an ice melting structure, which comprises an adjusting component and a heat exchanger 2, wherein: the heat exchanger 2, the pump body 3 connected with the heat exchanger and the valve 4 are positioned on a first branch 7 communicated with the ice storage tank 1, and the adjusting component is positioned on a second branch 8 communicated with the ice storage tank 1 and used for adjusting the flow of the secondary refrigerant after heat exchange with the ice storage tank 1 to the first branch 7.
Referring to fig. 1, the user terminal 6 is connected with the heat exchanger 2, chilled water flows between the heat exchanger 2 and the user terminal, the chilled water and the secondary refrigerant exchange heat in the heat exchanger 2, and the chilled water obtains the cold energy of the secondary refrigerant. When the load of the user terminal 6 is reduced, the flow rate of the secondary refrigerant which exchanges heat with the ice storage tank and flows into the heat exchanger 2 needs to be reduced so as to reduce the cold energy transferred to the chilled water.
The first branch 7 and the second branch 8 are arranged in parallel, the second branch 8 can divide the coolant after heat exchange in the ice storage tank 1, and when the coolant flowing into the second branch 8 increases, the flow rate of the coolant flowing into the first branch 7 decreases.
The ice-melt structure of this embodiment, through the adjusting part reposition of redundant personnel that is located second branch road 8 and flows into the secondary refrigerant that is located first branch road 7, when user end 6 load is lower, can adjust the pump body 3 to minimum stable frequency, but not minimum limit frequency, valve 4 aperture is turned down to minimum stable aperture, but not minimum limit aperture, if still can't satisfy the low-load of user end, can open adjusting part and increase adjusting part aperture, further satisfy user end 6 low-load demand, the aperture of pump body 3 operation and valve 4 is in a reasonable interval, guarantee the stability of ice-melt structure operation.
As an alternative embodiment, see fig. 1, in both the first branch 7 and the second branch 8, wherein the inlet end of the second branch 8 is arranged close to the outlet end of the ice bank 1.
By means of the structure, after the adjusting part is opened, the secondary refrigerant exchanging heat with the ice storage tank 1 can firstly pass through the second branch 8 and then is shunted to the second branch 8, and the flow flowing into the first branch 7 is reduced.
As an alternative embodiment, referring to fig. 1, the inlet end of the regulating member (regulating valve 5 in fig. 1) communicates with the outlet end of the ice storage tank 1, and the outlet end of the regulating member communicates with the inlet end of the ice storage tank 1.
The secondary refrigerant after heat exchange with the ice storage tank 1 can enter from the inlet end of the adjusting component and flow back to the inlet end of the ice storage tank 1 through the outlet end of the adjusting component, so that the flowing circulation of the secondary refrigerant is realized, and the loss of the secondary refrigerant is not involved.
As an alternative embodiment, see fig. 1, there is an outlet water manifold 92 at the outlet end of the ice storage tank 1 and an inlet water manifold 91 at the inlet end of the ice storage tank 1, wherein: the water inlet ends of the first branch 7 and the second branch 8 are connected with the water outlet main pipe 92, and the water outlet ends of the first branch 7 and the second branch 8 are connected with the water inlet main pipe 91.
The water outlet main pipe 92 communicated with the outlet end of the ice storage tank 1 is connected with the water inlet ends of the first branch 7 and the second branch 8, the first branch 7 and the second branch 8 do not need to be connected to the outlet end of the ice storage tank 1 respectively, the pipeline structure is compact, and the pipeline connection and operation are convenient; the water inlet main pipe 91 communicated with the inlet end of the ice storage tank 1 is connected with the water outlet ends of the first branch 7 and the second branch 8, so that the pipeline structure is more compact, and the cost is saved.
Referring to fig. 1, since the pump body 3 allows the coolant to flow to the inlet manifold 91 with a certain pressure, the coolant flowing out of the second branch passage 8 does not flow to the first branch passage 7.
As an alternative embodiment, the regulating component in this embodiment is a regulating valve 5. The valve with any opening degree adjustable in the prior art can be adopted, and is not limited herein.
Since the second branch 8 can branch off the coolant, the opening of the regulating valve 5 can be opened and increased when the load of the user terminal 6 is continuously reduced, without the need to minimize the opening of the regulating valve 5, and therefore, the operation of the regulating valve 5 is also stable and reliable.
As an alternative embodiment, see fig. 1, a valve 4 is connected to the inlet side of the heat exchanger 2 and a pump body 3 is connected to the outlet side of the heat exchanger 2.
The flow of the secondary refrigerant flowing into the heat exchanger 2 is adjusted by adjusting the opening degree of the valve 5, and the flow of the secondary refrigerant is adjusted by adjusting the frequency of the pump body 3.
As an optional implementation manner, in this embodiment, the pump body 3 connected to the heat exchanger 2 is a variable frequency water pump.
As an alternative embodiment, the adjusting part and the valve 4 connected to the heat exchanger 2 in this embodiment are both throttle valves with adjustable opening degrees.
The flow rate of the secondary refrigerant flowing into the heat exchanger 2 is adjusted by decreasing the opening degree of the valve 4 in the first branch 7, opening the adjusting member (adjusting valve 5) and increasing the opening degree of the adjusting member (adjusting valve 5). The requirement of the low load of the user terminal 6 is met, and the opening degree of the valve 4 can be ensured to be in a reasonable interval of stable operation.
The control method based on the ice melting structure comprises the following steps:
s1: setting the lowest stable frequency P of the pump body 3 and the minimum stable opening L of the valve 4;
s2: when the load of the user end 6 is reduced, the frequency of the pump body 3 is reduced and/or the opening degree of the valve 4 is reduced;
s3: when the frequency of the pump body 3 is reduced to the lowest stable frequency P, the opening degree of the valve 4 is reduced to the minimum stable opening degree L, and the flow rate of the secondary refrigerant flowing into the heat exchanger 2 is still larger than the load requirement of the user terminal 6, the adjusting part is opened and the opening degree is increased.
Wherein, the lowest stable frequency P of the pump body 3 can be set according to the variable curve of the variable frequency water pump; it means that at this frequency, the operating efficiency of the pump body is still in a better interval, not the lowest limit frequency of the pump body. The rated flow of the pump bodies of different types is different, so that no specific limitation is made, for example, 10% -30% of the rated flow of the pump bodies can be used as the minimum flow limit, and specific numerical values are determined according to the pump bodies selected in actual engineering.
At a minimum steady opening L of the valve 4, the adjustment of the valve 4 is not in a state of instability, the minimum steady opening being not a minimum limit opening. The opening degree of the valve 4 can be set at an opening degree corresponding to the minimum flow operation of 10% -30% of the pump body 3. The specific numerical value is determined according to actual conditions.
The ice-melting structure control method provided by the embodiment is based on the ice-melting structure, so that the method also has the advantages of meeting the low-load requirement of the user terminal 6 and ensuring the structure motion stability.
Alternatively, in S2, the frequency of the pump body 3 may be decreased and then the opening degree of the valve 4 may be decreased, or the opening degree of the valve 4 may be decreased and then the frequency of the pump body 3 may be decreased.
Specifically, in operation, when the load of the user terminal 6 is gradually reduced, the power of the pump body is reduced by adjusting the frequency of the variable frequency water pump (the pump body 3), and the flow rate of the secondary refrigerant flowing through the plate heat exchanger 2 is reduced, so that the requirement of reducing the terminal load is met.
When the load at the tail end is lower, the frequency of the pump body is continuously reduced until the lowest stable frequency P set by the pump body is reached, at this time, the frequency of the pump body is not reduced any more, but the opening degree of the valve 4 in the system is adjusted, and the opening degree of the valve 4 is gradually reduced until the minimum stable opening degree L is reached, so that the flow rate of the secondary refrigerant flowing through the plate heat exchanger 2 is reduced, and the requirement of low load at the tail end 6 of a user is met. At this moment, the operation of the variable frequency pump body is still in the interval with better efficiency, the opening degree of the valve 4 is still in a reasonable adjusting range, and meanwhile, the requirement of low load at the tail end can be met.
If the load at the tail end is still reduced at this time, the regulating valve 5 is opened, the opening degree of the regulating valve 5 is gradually increased, the flow rate of the secondary refrigerant flowing into the second branch 8 is gradually increased, and the flow rate of the secondary refrigerant flowing into the heat exchanger 2 is continuously and gradually reduced until the requirement of low load at the tail end is met.
Example 2
The embodiment provides an ice storage unit, which comprises an ice storage tank 1 and the ice melting structure connected with the ice storage tank 1.
The ice storage unit of the embodiment also has the advantages of stable and reliable structure operation due to the ice melting structure.
Example 3
The embodiment provides an air conditioning system which comprises the ice storage unit.
The air conditioning system of the embodiment comprises the ice storage unit, can meet the low-load requirement of the user terminal 6, and also has the advantage of reliable operation stability.
The particular features, structures, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An ice melting structure comprising an adjustment component and a heat exchanger, wherein:
the heat exchanger, the pump body and the valve which are connected with the heat exchanger are positioned on a first branch circuit communicated with the ice storage tank, and the adjusting component is positioned on a second branch circuit communicated with the ice storage tank and used for adjusting the flow of the secondary refrigerant which exchanges heat with the ice storage tank and flows to the first branch circuit.
2. Ice melting structure according to claim 1, in both said first branch and said second branch, wherein the inlet end of said second branch is located close to the outlet end of said ice bank.
3. Ice melting structure according to claim 1 or 2, characterised in that the inlet end of the regulating member communicates with the outlet end of the ice storage tank, and the outlet end of the regulating member communicates with the inlet end of the ice storage tank.
4. Ice melting structure according to claim 1 or 2, characterised in that there is a water outlet manifold at the outlet end of the ice storage tank and a water inlet manifold at the inlet end of the ice storage tank, wherein:
the water inlet ends of the first branch and the second branch are connected with the water outlet main pipe, and the water outlet ends of the first branch and the second branch are connected with the water inlet main pipe.
5. Ice melting structure according to claim 1 or 2, characterised in that the regulating means is a regulating valve.
6. Ice melting structure according to claim 1 or 2, characterised in that the valve is connected to the inlet end of the heat exchanger and the pump body is connected to the outlet end of the heat exchanger.
7. Ice melting structure according to claim 1 or 2, characterised in that the pump body connected to the heat exchanger is a variable frequency water pump.
8. Ice melting structure according to claim 1 or 2, characterised in that the regulating means and the valve connected to the heat exchanger are throttle valves with adjustable opening.
9. An ice thermal storage unit comprising an ice storage tank and the ice melting structure of any one of claims 1 to 8 connected to the ice storage tank.
10. An air conditioning system comprising the ice thermal storage unit of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023080210.6U CN214370649U (en) | 2020-12-17 | 2020-12-17 | Ice melting structure, ice cold storage unit and air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023080210.6U CN214370649U (en) | 2020-12-17 | 2020-12-17 | Ice melting structure, ice cold storage unit and air conditioning system |
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| Publication Number | Publication Date |
|---|---|
| CN214370649U true CN214370649U (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023080210.6U Active CN214370649U (en) | 2020-12-17 | 2020-12-17 | Ice melting structure, ice cold storage unit and air conditioning system |
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| CN (1) | CN214370649U (en) |
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